have happened in patients taking xeljanz. don't start xeljanz if you have any infection, unless ok with your doctor. tears in the stomach or intestines, low bod cell counts and higher liver tes and cholesterol levels have happened. your doctor should perform blood tts before you start and while taking xeljanz, and roinely check certain liver tests. tell your doctor if you have been to a region where certain fungal infections are common, and if you have had tb, hepatitis b oc, or are prone to infections. tell your doctor about all the medicines you take, and if you are pregnant, or plan to be. taken twice daily, xeljanz can reduce the joint pain and swelling of moderate to severe ra, even without methotrexate. ask if xeljanz is right for you.